North Pole Environmental Observatory ISUS Nitrate Data: 2012

• Main Authors: Matthew Alkire, Russ Desiderio
• Format: Dataset
• Language: unknown
• Published: Arctic Data Center 2013
• Subjects: EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE; EARTH REMOTE SENSING INSTRUMENTS > PASSIVE REMOTE SENSING > SPECTROMETERS/RADIOMETERS > SPECTROMETERS > SPECTROMETERS; AIRCRAFT; STATION; HOURLY TO DAILY; Arctic; Arctic Ocean; North Pole; Sea ice
• Online Access: https://search.dataone.org/view/urn:uuid:ee18e144-3803-4804-9b5c-7bfd1e76a594

This data set contains North Pole Environmental Observatory (NPEO) in-situ ultraviolet spectrophotometer (ISUS) nitrate data from the year 2012. This data set includes diverse measurements of seawater chemistry along with supporting conductivity, temperature, and depth (CTD) data from the Arctic Ocean near the North Pole. Measurements were taken from sea ice platforms each April or May from 2000-2008. Investigators used a CTD-O2 system to measure seawater conductivity, temperature, depth, and dissolved oxygen content, and collected Niskin bottle samples for measurements of salinity, oxygen isotope composition, total alkalinity, and concentrations of phosphate, silicic acid, nitrate, nitrite, ammonium, and barium. The available in-situ dissolved oxygen measurements were collected beginning in 2002. Beginning with the 2007 deployment, an ISUS was used to measure nitrate concentrations in the water column. The NPEO is a year-round, scientific observatory, deploying various instruments each April in order to learn how the world's northernmost sea helps regulate global climate. Supported by repeat hydrographic profiles, it includes a set of unmanned scientific platforms that record oceanographic, cryospheric, and atmospheric data throughout the year. More information about the project is available at the project web site: http://psc.apl.washington.edu/northpole.